<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="输入120个字符" maxlength="120" v-model='msg'></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in comments" :key="i">
                <div class="cmt-title">
                    第{{i+1}}楼&nbsp;&nbsp;用户：{{item.user_name}}&nbsp;&nbsp;发表时间：{{item.add_time | dataFormat}}
                </div>
                <div class="cmt-body">
                    {{item.content==='undefined' ? '此用户很烂':item.content}}
                </div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore()">加载更多</mt-button>
    </div>
</template>

<script>
import { Toast } from 'mint-ui';
export default {
    data() {
        return {
            pageIndex:1,
            comments:[],
            msg: '' // 评论输入的内容
        }

    },
    created() {
        this.getComments();
    },
    methods: {
        getComments() {
            this.$http.get("api/getcomments/"+ this.id +"?pageindex=" + this.pageIndex).then(result=>{
                if(result.body.status === 0) {
                    //this.comments = result.body.message;
                    this.comments = this.comments.concat(result.body.message)
                } else {
                    Toast('获取评论失败！')
                }
            })
        },
        getMore() {
            this.pageIndex++;
            this.getComments();
        },
        postComment() {
            if(this.msg.trim().length === 0) {
                return Toast('评论内容为空！');
            }
            this.$http
            .post('api/postcomment/' + this.$route.params.id, {
                content:this.msg.trim()
                })
                .then(result=>{
                    if(result.body.status === 0) {
                        // 1. 拼接出一个评论对象
                        var cmt = {
                            user_name:'匿名用户',
                            add_time:Date.now(),
                            content:this.msg
                        }
                        this.comments.unshift(cmt)
                        this.msg=""
                    }
                })
        }

    },
    props:['id']

    
}
</script>

<style lang='scss' scoped>
.cmt-container{
    h3{
        font-size:16px;
    }
    textarea{
        font-size:14px;
        height:85px;
        margin:0;
    }
    .cmt-list{
        margin:5px 0;
        .cmt-item{
            font-size:13px;
            .cmt-title{
                line-height:30px;
                background-color: #ccc;
            }

        }
        .cmt-body{
            line-height:35px;
            text-indent:2em;

        }

    }
}

</style>